We present the compact SECM system with a 3D-printed tethered endoscopic capsule with a 1060 nm center wavelength. Compared to the previously presented 1310 nm SECM system, the present SECM system theoretically provides 15% improved lateral resolution, 5.2 times faster imaging speed, and two times faster fabrication times. We performed in vivo imaging on the swine esophagus and the SECM images clearly visualized squamous cell nuclei as a bright dot surrounded by dark cytoplasm and bright cell borders. These results indicate that our new SECM endoscopic system making it easier to conduct cellular-level diagnosis of upper GI tract.
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